[특허]Timing adjustment control for efficient time division duplex communication

[미국특허] Timing adjustment control for efficient time division duplex communication 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-001/56
출원번호	US-0464285 (1995-06-05)
발명자 / 주소	Scott Logan
출원인 / 주소	Omnipoint Corporation
대리인 / 주소	Lyon & Lyon LLP
인용정보	피인용 횟수 : 70 인용 특허 : 97

초록 ▼

A system and method for time division duplex communication over a single frequency band wherein guard time overhead is reduced by active adjustment of reverse link transmission timing as a function of round trip propagation time. A time frame is divided into a plurality of time slots, during each of which the base station transmits to a user station and the user station transmits to the base station. Communication is initiated by a round trip timing transaction. In response to a general polling message from the base station, a user station seeking to establish communication transmits a short reply message. The base station calculates the distance of the user station by measuring the propagation delay with respect to receipt of the reply message. The base station sends a timing adjustment command to the user station instructing the user station to advance or retard its timing according to the calculated distance, so as to minimize guard times between time slots. Thereafter, the base station monitors the user station transmissions and periodically commands the user station to advance or retard its timing in a like manner. The user station may transmit a control preamble at the start of each time slot to allow the base station to perform round trip timing calculations, and/or to allow adjustment of user station power or antenna selection.

대표청구항 ▼

[ What is claimed is:] [1.] A method of time division duplex communication between a base station and a user station over a single frequency band, comprising the steps oftransmitting from a base station, over a designated frequency band, a user message from a user station directed to a base station,receiving said user message at said base station,calculating at said base station, based on the time of receiving said user message at said base station, a distance of said user station relative to said base station, andtransmitting, over said designated frequency band, a base message from said base station directed to said user station, said base message comprising a timing adjustment command whereby timing of a subsequent message from said user station directed to said base station over said designated frequency band is advanced or retarded, wherein said user station maintains a timing parameter relative to a fixed reference, and wherein said timing adjustment command modifies said timing parameter in order to advance or retard said timing.

이 특허에 인용된 특허 (97) 인용/피인용 타임라인 분석

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Lomp, Gary; Ozluturk, Fatih; Silverberg, Avi, Transferring voice and non-voice data.
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Proctor, Jr., James A., Transmittal of heartbeat signal at a lower level than heartbeat request.
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Proctor, Jr.,James A., Transmittal of heartbeat signal at a lower level than heartbeat request.
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Proctor, Jr., James A., Use of correlation combination to achieve channel detection.
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Proctor, Jr., James A., Use of correlation combination to achieve channel detection.
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Zhu, Song; Li, Yue; Guo, Xiaolong, User equipment pairing processing method, network side device, and user equipment.
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Zhu, Song; Li, Yue; Guo, Xiaolong, User equipment pairing processing method, network side device, and user equipment.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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